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United States Patent | 5,126,860 |
Nagano | June 30, 1992 |
An optical reading apparatus which can read both transparent and reflective originals is disclosed. The apparatus comprises: a transparent plate for supporting on the upper face an original from which information is to be read; a light source disposed below the plate; and optical reading unit disposed below the plate and having a converter information read from the original into electric signals; and a processor for processing these signals, and further comprises: a further optical reading unit disposed above the upper face of the plate and having another converter for converting information read from the original into further electric signals; and a switch for selecting either of the electric signals and the further electric signals to be supplied to the processor.
Inventors: | Nagano; Fumikazu (Yamatokoriyama, JP) |
Assignee: | Sharp Kabushiki Kaisha (Osaka, JP) |
Appl. No.: | 481159 |
Filed: | February 20, 1990 |
Feb 20, 1989[JP] | 1-41376 |
Current U.S. Class: | 358/471; 358/474; 358/487 |
Intern'l Class: | H04N 001/04 |
Field of Search: | 358/471,474,494,496,497,406,487,400,401,443 |
4568984 | Feb., 1986 | Juergensen et al. | 358/293. |
4816903 | Mar., 1989 | Utsuda et al. | 358/487. |
4893196 | Jan., 1990 | Koshiyouji et al. | 358/474. |
4989099 | Jan., 1991 | Koshiyouji et al. | 358/487. |
Foreign Patent Documents | |||
0097724 | Jan., 1984 | EP. | |
61-54759 | Mar., 1986 | JP. |
IBM Technical Disclosure Bulletin, vol. 19, No. 4, Sep. 1976, pp. 1355-1356, J. R. Hattersley: "Signal Processor for photodiode line scanners". |